NRF24L01 low power temp logger

4 years 1 month ago #2304 by Jagohu
Hi,

Thanks for the sketch and the code, I'm just experimenting with NRF24 and I was wondering, why did you connect the DHT11 to the digital port of Arduino? Why not Analogue? So far I have always used it on Analogue and it was the initial recommendation too.

Also, where did you define the parameters of your local wifi and the EasyIoT server?
Thanks a lot!

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4 years 1 month ago #2305 by NightOne
The DHT11 is a low-cost digital temperature and humidity sensor, so it is suppose to be pluged into digital. The arduino analog ports can be used as digital pins as well, so when you plug the DHT11 into an analog pin and upload the DHT library it automatically sets the pins to a digital.

Arduino digital ports can not however be used as analog ports.

www.adafruit.com/products/386 (info on DHT11)
www.arduino.cc/en/Tutorial/AnalogInputPins (info on Analog pins)
The following user(s) said Thank You: osalval, Jagohu

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3 years 11 months ago #2532 by NightFox
Hi hjfbaius, nice work! :) how are you powering the 4 boards in use?
I tried your programm with a DHT22, an arduino mini pro (8Mhz, without LED's,without voltage regulator) but it emptied the 2xAAA batteries quite fast so the node stopped working reliably.

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